:root {
    --c-a-primary: #0d1117;
    --c-a-secondary: #1c2431;
    --c-b-primary: white;
    --c-b-secondary: #ddd;
    --c-links: #0087ca;
    --c-bg: var(--c-a-primary);
    --c-title: var(--c-b-primary);
    --c-text: var(--c-b-secondary);
    --c-bg-footer: var(--c-bg);
    --c-footer-text: var(--c-b-primary);
}

@media (prefers-color-scheme: light) {
    :root {
        --c-a-primary: white;
        --c-a-secondary: #ddd;
        --c-b-primary: #0d1117;
        --c-b-secondary: #1c2431;
        --c-bg: var(--c-a-primary);
        --c-title: var(--c-b-primary);
        --c-text: var(--c-b-secondary);
        --c-bg-footer: #616A6B;
        --c-footer-text: var(--c-a-primary);
    }
}

html {
    height: 100%;
    box-sizing: border-box;
}

body {
    height: 100%;
    padding: 0;
    margin: 0;
    min-height: 100%;
    display: grid;
    grid-template-rows: auto 1fr auto;
    background-color: var(--c-bg);
    color: var(--c-text);
}

h1, h2, h3, h4, h5, h6, .title {
    color: var(--c-title);
}

* {
    box-sizing: inherit;
    font-family: system-ui;
}

main {
    width: 100%;
    max-width: 1280px;
    margin-right: auto;
    margin-left: auto;
    padding: 2rem 1rem;
}

main a {
    display: inline-block;
    position: relative;
    color: var(--c-links);
    text-decoration: none;
}

main a::after {
    content: '';
    position: absolute;
    width: 100%;
    transform: scaleX(0);
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--c-links);
    transform-origin: bottom left;
    transition: transform 0.25s ease-out;
}

main a:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}

@media screen and (min-width: 700px) {
    .right {
        grid-column: 2;
        grid-row: 1;
    }

    .left {
        grid-column: 1;
        grid-row: 1;
    }
}

@media screen and (max-width: 700px) {
    .right, .left {
        grid-column: 1;
    }
}

#backToTop {
    display: none;
    position: fixed;
    bottom: 55px;
    right: 55px;
    z-index: 99;
    font-size: 18px;
    border: none;
    outline: none;
    background-color: #00A6ED;
    padding: 15px;
    border-radius: 4px;
}

#backToTop:hover {
    background-color: #555;
}

nav.crumbs {
    border-bottom: 1px solid var(--c-b-primary);
}

.crumbs ol {
    list-style-type: none;
    padding-left: 0;
}

.crumb {
    display: inline-block;
}